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Classical Mechanics

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Moderate

Rolling Racers

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Three of your friends have challenged you to a race. You have a ramp and four objects: a hoop, a disk, a solid sphere and a hollow sphere. You will each choose one object and will release your object from rest at the top of the ramp. The first object to reach the bottom of the ramp wins. All four roll without slipping.

Which object should you choose if you want to win the race? (Ignore air resistance)

A

The hoop

B

The disk

C

The solid sphere

D

The hollow sphere